Thanks for the help, I think I understand. Not sure what a BCD is.

However, you are right- it is a 5-bolt chainring. I measured from the middle of one bolt to the middle of the next adjacent bolt and the measurement was 2 3/4, which is 69.85 mm.

That doesen't seem like a standard measurement.
here is a picture how I measured it:


Thanks a ton for your help!

I didn't think that moving from the small chainring to the large one would be a large jump.
What do people normally do when they have a large chainring? Get a larger 'smaller' chainring and also install it?